A method to increase the homogeneity of an olefin copolymer by reducing the amount of the component eluting at a temperature of greater than 90°C in the temperature rising elution fraction analysis wherein the copolymer is produced using a solution polymerization process in a single reactor in the presence of a catalyst system comprising: 1. transition metal catalyst of the formula: wherein M is selected from the group consisting of Ti, Zr and Hf; PI is a phosphinimine ligand; L is a monoanionic cyclopentadienyl-type ligand, X is independently selected from the group consisting of activatable ligands; m is 1 or 2; n is 0 or 1; p is an integer and the sum of m+n+p equals the valence state of M; 2. a boron activator capable of ionizing the transition metal complex selected from: (i) compounds of the formula [R 5] + [B(R 7) 4] - wherein B is a boron atom, R 5 is a cyclic C 5-7 aromatic cation or a triphenylcarbenium cation and each R 7 is independently selected from the group consisting of phenyl radicals which are unsubstituted or substituted with from 3 to 5 substituents selected from the group consisting of a fluorine atom, a C 1-4 alkyl or alkoxy radical which is unsubstituted or substituted by a fluorine atom; and a silyl radical of the formula -Si-(R 9) 3; wherein each R 9 is independently selected from the group consisting of a hydrogen atom and a C 1-4 alkyl radical; and (ii) compounds of the formula [(R 8) t ZH] + [B(R 7) 4] - wherein B is a boron atom, H is a hydrogen atom, Z is a nitrogen atom or phosphorus atom, t is 2 or 3 and R 8 is selected from the group consisting of C 1-8 alkyl radicals, a phenyl radical which is unsubstituted or substituted by up to three C 1-4 alkyl radicals, or one R 8 taken together with the nitrogen atom may form an anilinium radical and R 7 is as defined above; and (iii) compounds of the formula B(R 7) 3 wherein R 7 is as defined above; 3. an aluminoxane of the formula (R 4) 2 AlO(R 4 AlO) m Al(R 4) 2 wherein each R 4 is independently selected from C 1-4 alkyl radicals and m is from 3 to 50: and adjusting one or more of: a) the ratio of components 2 and 3; or b) changing component 2. 1. transition metal catalyst of the formula: wherein M is selected from the group consisting of Ti, Zr and Hf; PI is a phosphinimine ligand; L is a monoanionic cyclopentadienyl-type ligand, X is independently selected from the group consisting of activatable ligands; m is 1 or 2; n is 0 or 1; p is an integer and the sum of m+n+p equals the valence state of M; 2. a boron activator capable of ionizing the transition metal complex selected from: (i) compounds of the formula [R 5] + [B(R 7) 4] - wherein B is a boron atom, R 5 is a cyclic C 5-7 aromatic cation or a triphenylcarbenium cation and each R 7 is independently selected from the group consisting of phenyl radicals which are unsubstituted or substituted with from 3 to 5 substituents selected from the group consisting of a fluorine atom, a C 1-4 alkyl or alkoxy radical which is unsubstituted or substituted by a fluorine atom; and a silyl radical of the formula -Si-(R 9) 3; wherein each R 9 is independently selected from the group consisting of a hydrogen atom and a C 1-4 alkyl radical; and (ii) compounds of the formula [(R 8) t ZH] + [B(R 7) 4] - wherein B is a boron atom, H is a hydrogen atom, Z is a nitrogen atom or phosphorus atom, t is 2 or 3 and R 8 is selected from the group consisting of C 1-8 alkyl radicals, a phenyl radical which is unsubstituted or substituted by up to three C 1-4 alkyl radicals, or one R 8 taken together with the nitrogen atom may form an anilinium radical and R 7 is as defined above; and (iii) compounds of the formula B(R 7) 3 wherein R 7 is as defined above; (i) compounds of the formula [R 5] + [B(R 7) 4] - wherein B is a boron atom, R 5 is a cyclic C 5-7 aromatic cation or a triphenylcarbenium cation and each R 7 is independently selected from the group consisting of phenyl radicals which are unsubstituted or substituted with from 3 to 5 substituents selected from the group consisting of a fluorine atom, a C 1-4 alkyl or alkoxy radical which is unsubstituted or substituted by a fluorine atom; and a silyl radical of the formula -Si-(R 9) 3; wherein each R 9 is independently selected from the group consisting of a hydrogen atom and a C 1-4 alkyl radical; and (ii) compounds of the formula [(R 8) t ZH] + [B(R 7) 4] - wherein B is a boron atom, H is a hydrogen atom, Z is a nitrogen atom or phosphorus atom, t is 2 or 3 and R 8 is selected from the group consisting of C 1-8 alkyl radicals, a phenyl radical which is unsubstituted or substituted by up to three C 1-4 alkyl radicals, or one R 8 taken together with the nitrogen atom may form an anilinium radical and R 7 is as defined above; and (iii) compounds of the formula B(R 7) 3 wherein R 7 is as defined above; 3. an aluminoxane of the formula (R 4) 2 AlO(R 4 AlO) m Al(R 4) 2 wherein each R 4 is independently selected from C 1-4 alkyl radicals and m is from 3 to 50: and adjusting one or more of: a) the ratio of components 2 and 3; or b) changing component 2. a) the ratio of components 2 and 3; or b) changing component 2.