I just bought a 64Mb SIMM on an online auction for my Blizzard 1260. Today when I opened the package I noticed that it was a double sided SIMM which wouldn't fit.

I decided to try it anyway by holding it in place with my thumb while booting up, and it actually showed 62.3Mb after I booted. I now use a rubberband to keep it in place.
My question is... can the double sided SIMM make my Amiga unstable, or even worse possibly damage my hardware.. or is it just a question of not enough room on the board?