Glyph of Overload's function is odd

[Julius Seizure.4985]

Hey guys. Supposedly Glyph of Overload's 100% chance of a bonus strikes negates all other bonus strikes (according to the wiki).

However, I am quite often seeing results of 3 and even 4 harvests per node. This doesn't seem consistent, however.

One thing I may have noticed is that activating the glyph and harvesting in the same zone results in a flat 100% chance. However, activating the overload harvest, then stacking additional buffs (Item Booster @33%, etc) then zoning will result in stacking the bonuses.

Is anyone else seeing this?