Really, if I worked in a fabric store, (instead of as a seamstress for hire and enamel artisan), I would make certain that the Velcro, if purchased, either had the fluffy side and the burry side stuck together neatly , or wrapped them separately. I can only imagine that the clerk* was either (#1) truly clueless, (#2) impossibly harried, or (#3) actively malicious, to shove five yards of Velcro into a small bag randomly... just saying...
I'm taking a break after spending far too much time and not yet finished untangling this:
nasty ball-o-Velcro, atop almost finished Roman Shade project
* and since these supplies were not bought at the Evil Empire, I'm betting on #1