Congratulations Helldiver, Your efforts in Varylia 5 has resulted in Super Earth obtaining control of the Petafactory. The EXO-49 Emancipator Exosuit is now available Helldivers (Purchase with 20,000 requisition slips at your Super Destroyer). For a limited time, SEHC has issued the EXO-49 as a mission stratagem.
SEHC has praised the Helldivers for the defence of Angel's Venture, allowing the front to remain stable. The Terminid hivemind is now attacking Heeth with the goal of destroying the newly-constructed SEAF Training Facility.
You can, but you're not supposed to be able to. Just put the first one in the first slot and the other one in slot 4.
Other people report success with overwriting a strategem with the other mech.