Evenly spaced, none touching, all with the same pen, letters about the same size. I get signatures every year at the HOF and every guy I hand the glove to wants to sign all the way across it. This may be a caution that doesn't really mean anything because there may be a simple and believable explanation. There may truly be some boxing autograph mogul with considerable access and control over these champs, but buyers need to know where, when and by whom each signature was obtained. Dealers with integrity know that dates and times and places of signings can be checked out.
Unscrupulous dealers know that, too.
You should be thinking when you buy any piece of memorabilia about what folks will ask of you if and when you sell it. Think about it. Always ask under what circumstance a dealer will refund your money and get it in writing no matter how long the guarantee is for. And find out exactly what the forensic expert has done. He also says he may do 50 items in a day.