VRRP-E instances are confined to the VLAN in which they reside, meaning that you are not required to use a different VRRP-E VRID for each VLAN.
If you are setting up multiple VRIDs in a single VLAN, they will need to use unique values for each. Also any device participating in VRRP-E within the same VLAN will need to use the same VRIDs as its peers.
Using the same VRID does not get around any limitations for VRRP-E Instances. Even though you may have 10 different VLANs using the same VRID “1” you will have 10 unique instances of VRRP-E running.
I hope this answers your question.
Principal Technical Support Engineer