Greasing the rear splines on 04 Vulcan 750

[AMH]

Hello to all,
Just removed the final drive unit to pack the rear of the drive shaft and grease the splines (front & rear) with moly60 lube. The bike has close to 6k on it. I packed 17 ml (clymers' manual) almost 3 teaspoon of moly 60 grease inside the shaft & spring.

However, when I try to insert the final drive slowly back in, I see some grease coming back out passed the "O ring". I did this 2-3 times and I always have some grease come back out as I push the final drive back in. I made sure no air is trapped & inspected the "O ring" it seemed Ok. Did I maybe put too much grease, should I not worry about it or try to remove the final gear again and clean the extra grease off?

Thanks in advance for all replies and happy riding!