It seems clear from the Wikipedia The situation report and the memo are not made up evidence.
"Conspiracy theories[edit]
Main article: Oklahoma City bombing conspiracy theories
A variety of conspiracy theories have been proposed about the events surrounding the bombing. Some theories allege that individuals in the government, including President Bill Clinton,[220][221] knew of the impending bombing and intentionally failed to act. Other theories focus on initial reports by local news stations of multiple other unexploded bombs within the building itself as evidence of remnants of a controlled demolition; following the attack, search and rescue operations at the site were delayed until the area had been declared safe by the Oklahoma City bomb squad and federal authorities.[222]
According to both a situation report[223] compiled by the Federal Emergency Management Agency and a memo[224] issued by the United States Atlantic Command the day following the attack, a second bomb located within the building was disarmed while a third was evacuated. Further theories focus on additional conspirators involved with the bombing.[225] Additional theories claim the bombing was carried out by the government in order to frame the militia movement or to provide the impetus for new antiterrorism legislation while using McVeigh as a scapegoat.[220][221][226][227] Other conspiracy theories suggest that foreign agents, particularly Islamic terrorists but also the Japanese government or German Neo-Nazis, were involved in the bombing.[157][228][229] Experts have disputed the theories and government investigations have been opened at various times to look into the theories."
If you go to the bottom of the Wikipedia there is a works sited page. Look at #233 the situation report and the FEMA Memo #224 and see the documents.
https://en.wikipedia.org/wiki/Oklahoma_City_bombing
Attached is one of the documents
No mention of Tow Missie or Equipment being mistaken as any Bombs.